Binary package “libgtkglext1” in ubuntu oracular
OpenGL Extension to GTK+ (shared libraries)
GtkGLExt provides the GDK objects to support OpenGL rendering in GTK+,
and GtkWidget API add-ons to make GTK+ widgets OpenGL-capable.
GtkGLExt provides the GDK objects to support OpenGL rendering in GTK+,
and GtkWidget API add-ons to make GTK+ widgets OpenGL-capable.